What tool can be used to debug a Shopify theme?

The most effective tool for debugging a Shopify theme is the Shopify Inspector. This tool is specifically designed to help developers understand the structure and behaviors of Shopify store themes. It provides valuable insights into Liquid templates, section rendering, and more, enabling developers to identify and resolve issues directly in the browser.

Using Shopify Inspector, developers can inspect elements on the page, view the source code, and see how the styles are applied. This functionality is especially crucial when dealing with Liquid code, as it allows developers to see exactly how data is being rendered on the front end.

The other options, such as PHPStorm or online calculators, might assist with coding or performing calculations but do not focus on the specific needs of debugging within Shopify themes. Additionally, the idea that no tools are necessary overlooks the complexities of theme development, where understanding and fixing errors is paramount to delivering a polished final product. Therefore, the Shopify Inspector stands out as the most relevant tool for this purpose.